They are very bad cabmen.
"Tompkins forsakes his last and awl For literary squabbles; Styles himself poet; but his trade Remains the same,--he cobbles." Don't choose a profession or occupation because your father, or uncle, or brother is in it.

Don't choose a business because you inherit it, or because parents or friends want you to follow it.

Don't choose it because others have made fortunes in it.

Don't choose it because it is considered the "proper thing" and a "genteel" business.

The mania for a "genteel" occupation, for a "soft job" which eliminates drudgery, thorns, hardships, and all disagreeable things, and one which can be learned with very little effort, ruins many a youth.
When we try to do that for which we are unfitted we are not working along the line of our strength, but of our weakness; our will power and enthusiasm become demoralized; we do half work, botched work, lose confidence in ourselves, and conclude that we are dunces because we cannot accomplish what others do; the whole tone of life is demoralized and lowered because we are out of place.
How it shortens the road to success to make a wise choice of one's occupation early, to be started on the road of a proper career while young, full of hope, while the animal spirits are high, and enthusiasm is vigorous; to feel that every step we take, that every day's work we do, that every blow we strike helps to broaden, deepen, and enrich life! Those who fail are, as a rule, those who are out of their places.